Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
Curious; as it happens I had to do this for a project I was working on some months back, and came to the same conclusion as ikegami. My code reads thusly (copied and pasted):
open( *Parse::RecDescent::ERROR, '>', \(my $parse_error) ) or croak("Error: unable to redirect SDTERR."); $Parse::RecDescent::skip = ' *\x{0} *'; $::RD_ERRORS++; $::RD_WARN++; $::RD_HINT++; my $parser = Parse::RecDescent->new($grammar) or die("Bad grammar! +");
I can assure you that does actually work for me (perl 5.8.8, P::RD 1.94). My best guess is that your use of local on that open call is maybe creating problems?

The dependency on P::RD internals always bothered me as well, but I never got around to figuring out a better way to do this.

Cheers, Tim

Update: Yup, turns out if you remove that local then it works:
use strict; use Parse::RecDescent; sub parse { my ($grammar, $str) = @_; open(*Parse::RecDescent::ERROR, '>', \my $error) or die "Cannot open in-memory filehandle: $!"; local $::RD_ERROR = 1; local $::RD_WARN = 2; my $p = Parse::RecDescent->new($grammar) or die "Grammar is invalid"; my $x = $p->start($str); defined $x or die "CAPTURED: $error"; return $x; } print parse('start: /foo/ | <error>', 'fo'), "\n";

In reply to Re^3: How to grab Parse::RecDescent error output in a variable? by tfrayner
in thread How to grab Parse::RecDescent error output in a variable? by w-ber

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others rifling through the Monastery: (13)
    As of 2014-10-23 17:31 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      For retirement, I am banking on:










      Results (126 votes), past polls